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sql: update time-zone.md #876

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Sep 11, 2018
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sql: update time-zone.md #876

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sql: add a blank line to avoid website error
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Expand Up @@ -5,7 +5,11 @@ category: user guide

# 时区支持

TiDB 使用的时区由 `time_zone` 全局变量和 session 变量决定。`time_zone` 的初始值是机器当前的系统时区 'SYSTEM'。
TiDB 使用的时区由 `time_zone` 全局变量和 session 变量决定。`time_zone` 的默认值是 `System`， `System` 对应的实际时区是 TiDB 集群 bootstrap 初始化时设置。具体逻辑如下:
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Delete two extra spaces:

  • before "的默认值"
  • before "System 对应的"

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对应的实际时区在TiDB 集群 bootstrap 初始化时设置

* 优先使用 `TZ` 环境变量
* 如果失败，这从 `/etc/localtime` 的实际软链地址提取。
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这 -> 则？

* 如果上面两种都失败则使用 `UTC` 作为系统时区。


在运行过程中可以修改全局时区：

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